Sunyaev Zeldovic Effect
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The
Sunyaev Zeldovic effect (also refered to as the
SZ effect or
Sunyaev Zeldovic theory) is the phenonomena that radiant
cosmic microwave background radiation (
CMB) interacting with "
electron" clouds distorts the spectrum of the radiation. High energy of the negative particles cause
photons to recieve energy. The
CMB's isotropy, such that of a
plasma state in all directions, increases this
induction. When investigated, the
Compton effect between the "
photons" and the "
electrons" alters the spectrum observed by the detectors. The plasmas of galaxies scatters the CMB and relatively distort the background spectrum, thus contributing to statistical uncertainties.
Sunyaev Zeldovic theory relies on the basis of:
Sunyaev & Zeldovich predicted the effect and conducted research in 1969, 1972, and 1980. The Sunyaev Zeldovic effect is a chief
astrophysical and
cosmological interest. Sunyaev Zeldovic theory will determine disk accretion and photon-electron scattering. The Sunyaev Zeldovic effect can also help determine the value of the
Hubble constant and universal motion parameters.
Observed distortions of the microwave background spectrum are used to detect the of density perturbations of the universe. Using the Sunyaev Zeldovic theory, research on very large scale velocity fields have been done and future CMB detection experiments will have to account for the contributions from various mediums generated through the Sunyaev-Zeldovich effect. Current research is focused on the distinctive type of angular fluctuations from the Sunyaev Zeldovic Effect in the microwave background, due to plasma galaxy clusters redshifts, to measure the scale of the universe. Hydrodynamic structure formation experiments are being studied to gain data on thermal and kinetic effects in the theory. Observations are difficult due to the size of the effect and other discrete electromagnetic fluctuations.
See also: Rashid Sunyaev
External links and references
- Birkinshaw, Mark, "The Sunyaev Zeldovic Effect", Department of Physics, University of Bristol, Bristol, UK.
- Ma, Chung-Pei, and J. N. Fry, "Nonlinear Kinetic Sunyaev-Zeldovich Effect". PRL. May 27 2002. (arXiv.org)
- Sunyaev, R. A. and Ya. B. Zeldovich, "Small-Scale Fluctuations of Relic Radiation". Astrophysics and Space Science, Vol. 7, p.3, 1970.
- Sunyaev, R. A.; Zeldovich, Ia. B. "Microwave background radiation as a probe of the contemporary structure and history of the universe". Annual review of astronomy and astrophysics. Volume 18. Palo Alto, California. 1980.